Myocardial ischemia-reperfusion injury (MIRI) acute myocardial infarction (AMI) is the most difficult problems in the reperfusion therapy, the serious influence the prognosis of AMI patients, is a hotspot and difficulty in the study of scholars both at home and abroad. Studies have shown that PI3K/Akt/GSK-3β signaling pathways activated, which is the important mechanism of the MIRI, intervention in the signal path can make MIRI myocardial protection. Our previous studies have found that the dragon's blood flavonoids can reduce MIRI PI3K expression level in rats, reduce the myocardial cell apoptosis, suggesting the dragon's blood flavonoids may through the activation of PI3K/Akt/GSK-3β signaling pathways play to MIRI rat myocardial protection. This project intends to establish rat MIRI model, comprehensive analysis using Real - Time PCR, Western Blot and the miRNA gene chip dragon's blood flavonoids molecular mechanism of MIRI inhibition. Rat myocardial cell lines anoxia/reoxygenation model is set up, watch the dragon's blood flavonoids pretreatment on hypoxia/reoxygenation myocardial protection. Delve into the dragon's blood on the cell and molecular mechanism of MIRI myocardial protective effect of flavonoid, prevention and treatment of MIRI for traditional Chinese medicine to provide new theoretical basis and therapeutic targets.
心肌缺血再灌注损伤(MIRI)是急性心肌梗死(AMI)再灌注治疗中最棘手的问题,严重影响AMI患者的预后,是国内外学者研究的热点和难点。研究表明PI3K/Akt/GSK-3β信号通路被激活是MIRI的重要机制之一,干预该信号通路可使MIRI心肌得到保护。我们的前期研究发现龙血竭总黄酮可降低MIRI大鼠PI3K表达水平,减少心肌细胞凋亡,由此推测龙血竭总黄酮可能通过激活PI3K/Akt/GSK-3β信号通路发挥对MIRI心肌的保护作用。本项目拟建立大鼠在体MIRI模型,采用RT-PCR、Western Blot及miRNA基因芯片等方法研究龙血竭总黄酮对MIRI心肌保护的细胞分子机制;构建大鼠心肌细胞缺氧/复氧模型,观察龙血竭总黄酮预处理对缺氧/复氧心肌的保护作用,深入探讨龙血竭总黄酮对MIRI心肌保护作用的细胞分子机制,为中药防治MIRI提供新的理论依据和治疗靶点。
心肌缺血再灌注损伤(MIRI)是急性心肌梗死(AMI)再灌注治疗中最棘手的问题,严重影响AMI患者的预后。然而,如何保护心肌缺血再灌注损伤是国内外学者研究的热点和难点。我们的前期研究发现龙血竭总黄酮可降低MIRI大鼠PI3K表达水平,减少心肌细胞凋亡,由此推测龙血竭总黄酮可能通过激活PI3K/Akt/GSK-3β信号通路发挥对MIRI心肌的保护作用。因此我们深入探索龙血竭总黄酮是否能通过激活PI3K/Akt/GSK-3β信号通路发挥对MIRI心肌的保护作用。研究结果发现:1、ESM-1通过上调AKT/mTOR表达,使AKT发生磷酸化,促进MIRI的发生发展.2、HMGB1上调PI3K/AKT表达,激活PI3K发生磷酸化而发挥作用。3、龙血竭总黄酮对心肌缺血再灌注损伤具有保护作用。4、龙血竭总黄酮通过影响PI3K/Akt信号通路抑制心肌细胞凋亡减轻MIRI。5、龙血竭总黄酮通过影响PI3K/Akt信号通路抑制心肌细胞焦亡减轻MIRI。此研究成果为MIRI的发病及防治提供重要的理论依据,为中药防治MIRI提供新的理论依据和治疗靶点。未来通过本研究的推广应用,可从中医药方面能有效改善MIRI的疗效,在临床MIRI防治上具有很大的实用价值和广泛的发展前景,并产生相应的社会效益和经济效益,同时也有利于心血管学科建设,利于祖国传统中医的发展。
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数据更新时间:2023-05-31
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